Like Dave said, ABS programming and functionality is completely separate from what driving mode you are in (PTM modes and normal road modes. In fact you can't select or alter ABS functionality. It runs in the background.
Since you don't seem to know what each PTM setting does in terms of stability control and traction control, I suggest you read the sticky note about PTM modes in the 1LE section of this forum
https://www.camaro6.com/forums/showthread.php?t=496996